// 实现这个项目的构建任务
const { src,dest,parallel,series, watch} = require('gulp')
const del = require('del')
const browserSync =require('browser-sync')

const loadPlugins = require('gulp-load-plugins')
const plugins = loadPlugins()
const bs = browserSync.create()



const data = {
  menus: [
    {
      name: 'Home',
      icon: 'aperture',
      link: 'index.html'
    },
    {
      name: 'Features',
      link: 'features.html'
    },
    {
      name: 'About',
      link: 'about.html'
    },
    {
      name: 'Contact',
      link: '#',
      children: [
        {
          name: 'Twitter',
          link: 'https://twitter.com/w_zce'
        },
        {
          name: 'About',
          link: 'https://weibo.com/zceme'
        },
        {
          name: 'divider'
        },
        {
          name: 'About',
          link: 'https://github.com/zce'
        }
      ]
    }
  ],
  pkg: require('./package.json'),
  date: new Date()
}

const clean = () =>{
    return del(['dist','temp'])
}

const style = () => {
    return src('src/assets/styles/*.scss',{base:'src'})
        .pipe(plugins.sass({outputStyle:'expanded'}))
        .pipe(dest('temp'))
        .pipe(bs.reload({stream:true}))
}
const script = () => {
    return src('src/assets/scripts/*.js',{base:'src'})
        .pipe(plugins.babel({presets:['@babel/preset-env']}))
        .pipe(dest('temp'))
        .pipe(bs.reload({stream:true}))
}
const page = () => {
    return src('src/*.html',{base:'src'})
        .pipe(plugins.swig({data,defaults:{cache:false}}))
        .pipe(dest('temp'))
        .pipe(bs.reload({stream:true}))
}
const image = () => {
    return src('src/assets/images/**',{base:'src'})
        .pipe(plugins.imagemin())
        .pipe(dest('dist'))
}
const font = () => {
    return src('src/assets/fonts/**',{base:'src'})
        .pipe(plugins.imagemin())
        .pipe(dest('dist'))
}
const extra = () => {
    return src('public/**',{base:'public'})
}
const serve = () => {
    watch('src/assets/styles/*.scss',style)
    watch('src/assets/scripts/*.js',script)
    watch('src/*.html',page)
    // watch('src/assets/images/**',image)
    // watch('src/assets/fonts/**',font)
    // watch('public/**',extra)
    watch([
      'src/assets/images/**',
      'src/assets/fonts/**',
      'public/**',
    ],bs.reload)
    bs.init({
        notify:false,
        port:2080,
        // open:false,
        // files:'dist/**',
        server:{
            baseDir:['temp','src','public'],
            routes:{
                '/node_modules':'node_modules'
            }
        }
    })
}

const useref = () =>{
  return src('temp/*.html',{base:'temp'})
    .pipe(plugins.useref({searchPath:['temp','.']}))
    .pipe(plugins.if(/\.js$/,plugins.uglify()))
    .pipe(plugins.if(/\.css$/,plugins.cleanCss()))
    .pipe(plugins.if(/\.html$/,plugins.htmlmin({
      collapseWhitespace:true,
      minifyCSS:true,
      minifyJS:true
      })))
    .pipe(dest('dist'))
}
const compile = parallel(style,script,page)
const build = series(
  clean, 
  parallel(
    series(compile,useref),
    image,
    font,
    extra
  )
) 
const develop = series(compile,serve)

module.exports ={
  clean,
  build,
  develop
    
}